ResMed Elisee 350 Clinical Manual page 25

P
TgI(P)
Non-invasive inspiratory trigger TgI: Operates with a single or double
circuit
It is activated according to the amplitude of the pressure variation when the patient makes an
inspiratory effort. Activation of the trigger is based on several algorithms, making it possible to
detect the patient's inspiratory effort, regardless of whether the patient's respiratory rate is rapid
or slow. The trigger also takes into account the rate of unintended leaks in the circuit.
The values that may be chosen are:
•
From 1 to 5: 1 is the maximum sensitivity value (triggering of a cycle with minimal patient
effort) and 5 is the minimum sensitivity value (the patient must make a greater effort to
trigger a cycle)
•
Auto: corresponds to a value between 2 and 3
•
No (controlled ventilation).
P
Expiratory trigger TgE
The value which defines the end of an inspiratory phase. It is configured as follows:
•
In automatic mode: Adjusting the expiratory trigger in automatic mode allows the Ti to
vary from one respiratory cycle to another, according to the effort characteristics of the
patient. Thus, Ti varies according to the shape of the flow curve and the maximum flow
value. An imaginary line (shown as a dotted line in the figure below) is drawn between the
cycle start point and the point of the co-ordinates ( max, 2.3 s line). Cycling occurs when
the decelerating flow curve intersects with this imaginary line (which corresponds to
cycling at approximately 30% of the peak flow).
V Vmax 1
Vmax 2
NOT013281-8
t
TgI = 1
TgI = 2
TgI = 3
TgI = 4
TgI = 5
2.3 s line
Passage to expiration (cycling)
t (s)
t (s)
2.3
t (s)
t (s)
°
Ventilation 19/102